Display screen with an icon



FIG. 1 is a front view of a display screen with an icon showing our my design; and,

FIG. 2 is a front view of a display screen with an icon showing an alternative embodiment of my new design.

The broken line showing of the remainder of the display screen is for environmental purposes only and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen with an icon, as shown and described. 